cameracomparison · 2-way
OM System OM-1 II vs ZWO ASI1600MM Pro
OM System
OM-1 II
A strong fit for photographers stepping into astro pairing with longer focal lengths where framing is tight.
ZWO
ASI1600MM Pro
A strong fit for dedicated deep-sky imagers pairing with a broad range of focal lengths.
Key differences
Finer pixels (3.35µm vs 3.8µm)
23% more resolution
Uncooled
Color vs mono
Specifications
| Specification | OM System OM-1 II | ZWO ASI1600MM Pro |
|---|---|---|
| Sensor | ||
| Type | dslr | Dedicated Cooled |
| Sensor | OM System 4/3 stacked BSI | Panasonic MN34230 |
| Sensor tech | CMOS | CMOS |
| Format | 4/3" | 4/3" |
| Sensor size | 17.4×13.0mm | 17.7×13.4mm |
| Diagonal | 21.8mm | 22.2mm |
| Pixel size | 3.35µm | 3.80µm |
| Resolution | 5184×3888 | 4656×3520 |
| Megapixels | 20.1MP | 16.4MP |
| Color | Yes | No |
| Cooling | ||
| Cooled | No | Yes |
| Performance | ||
| Full well | — | 20000e⁻ |
| Peak QE | — | 60% |
Advantages of OM System OM-1 II
- Finer sampling at 3.35µm pixels
- Higher resolution (20.1MP vs 16.4MP)
- One-shot color — simpler workflow
Advantages of ZWO ASI1600MM Pro
- Larger pixels — better low-light per-pixel sensitivity
- Regulated cooling for long exposures
- Mono sensor — ideal for narrowband and LRGB
Best for — OM System OM-1 II
- Longer focal lengths — tighter framing on small targets
- Well-sampled deep-sky at medium focal lengths
- One-shot color — quick results, less processing
Best for — ZWO ASI1600MM Pro
- Balanced field for most refractors
- Well-sampled deep-sky at medium focal lengths
- Long-exposure deep-sky under any sky
- Narrowband and LRGB workflows
OM System OM-1 II — typical FOV & scale
- On 250mm refractor (wide)FOV: 3.99° × 2.98°Scale: 2.76"/px
- On 800mm SCT reducerFOV: 1.25° × 0.93°Scale: 0.86"/px
- On 2000mm SCT nativeFOV: 0.50° × 0.37°Scale: 0.35"/px
ZWO ASI1600MM Pro — typical FOV & scale
- On 250mm refractor (wide)FOV: 4.06° × 3.07°Scale: 3.14"/px
- On 800mm SCT reducerFOV: 1.27° × 0.96°Scale: 0.98"/px
- On 2000mm SCT nativeFOV: 0.51° × 0.38°Scale: 0.39"/px
OM System OM-1 II — recommended user
A strong fit for photographers stepping into astro pairing with longer focal lengths where framing is tight.
ZWO ASI1600MM Pro — recommended user
A strong fit for dedicated deep-sky imagers pairing with a broad range of focal lengths.